Product Description
Magnesium Sulfate Heptahydrate Description
- Basic Information
- Magnesium sulfate heptahydrate, with the chemical formula MgSO4·7H2O, is a hydrous salt also commonly referred to as Epsom salt. This compound is composed of one magnesium cation (Mg²+), one sulfate anion (SO4²-), and seven water molecules bound within its crystal lattice. It has a molar mass of approximately 246.47 g/mol and is a crucial chemical in various industrial, scientific, and consumer - related applications.
- Physical Properties
- Appearance: In its pure state, magnesium sulfate heptahydrate appears as colorless, monoclinic crystals. When processed into a powder, it transforms into a fine, white substance with a smooth texture. The crystals exhibit a vitreous luster, giving them a shiny, glass - like appearance, and it is odorless, making it suitable for a wide range of applications where smell is a concern.
- Solubility: It is highly soluble in water. At 20°C, around 26.9 grams of the compound can dissolve in 100 milliliters of water. This high solubility increases with temperature, following an endothermic dissolution process. It is also sparingly soluble in ethanol and insoluble in most organic solvents.
- Density and Melting Point: The compound has a density of about 1.68 g/cm³. When heated, it undergoes a series of dehydration reactions instead of a typical melting process. Starting at approximately 48°C, it begins to lose water molecules, gradually transforming into lower hydrates until it becomes anhydrous magnesium sulfate at temperatures above 200°C.
- Chemical Properties
- Stability: In normal environmental conditions, magnesium sulfate heptahydrate is stable. However, exposure to heat or desiccating agents can cause it to lose its water of crystallization. The water molecules in the hydrate are held by relatively weak forces, making them removable under specific conditions.
- Reactivity: It can react with various chemicals. For example, when reacted with strong bases, the magnesium ion can form insoluble magnesium hydroxide precipitates. In acidic solutions, it remains in ionic form, contributing to the solution's conductivity. It can also participate in metathesis reactions with other soluble salts under appropriate conditions.
- Production Methods
- Natural Extraction: Natural deposits in salt lakes, brine wells, and mineral springs are major sources. Brine containing magnesium sulfate is pumped to the surface and subjected to evaporation, either through solar evaporation in large ponds or mechanical evaporation. As water evaporates, the compound precipitates out, which is then harvested, washed to remove impurities, and dried.
- Chemical Synthesis: It can be produced by reacting sulfuric acid with magnesium - containing compounds. Common reactants include magnesium oxide (MgO), magnesium hydroxide (Mg(OH)2), or magnesium carbonate (MgCO3). The reaction is highly exothermic. After the reaction, the solution is filtered to remove impurities, and the magnesium sulfate heptahydrate is crystallized through cooling or evaporation.
- Quality and Purity Standards
- Purity Requirements: Industrial - grade magnesium sulfate heptahydrate typically requires a minimum purity of 99%. For applications in pharmaceuticals, food, and cosmetics, even higher purity levels are necessary. Impurities such as heavy metals must be present at extremely low concentrations, often within parts per million (ppm) or parts per billion (ppb) ranges, to meet strict regulatory standards.
- Quality Control Methods: Analytical techniques like titration are used to determine the magnesium content. Atomic absorption spectroscopy and inductively coupled plasma - optical emission spectroscopy (ICP - OES) detect trace heavy metals. X - ray diffraction (XRD) analyzes the crystal structure to ensure the correct form of the compound, while moisture analysis monitors the water content.
- Storage and Handling
- Storage Conditions: It should be stored in a cool, dry place, away from direct sunlight and heat sources to prevent dehydration. Tightly sealed containers are essential to avoid moisture absorption, which can lead to caking. Recommended storage temperatures are below 30°C, and humidity levels should be kept low.
- Handling Precautions: Although generally non - hazardous, proper personal protective equipment (PPE), such as gloves and safety goggles, should be worn when handling large quantities to prevent eye and skin contact. In case of contact, immediate rinsing with water is recommended.
Appearance:
colorless or white crystals
Size:
Magnesium sulfate heptahydrate 0.1mm~1mm
Magnesium sulfate heptahydrate 1~3mm
Magnesium sulfate heptahydrate 2~4mm
Product Parameters
TEST ITEMS
|
TEST STANDARD |
TEST RESULT |
| PURITY |
≥99.5% |
99.68% |
| MAGNESIUM SULFATE(MgSO4) |
≥48.0% |
48.38% |
| MAGNESIUM OXIDE (MgO) |
≥16.0% |
16.24% |
| MAGNESIUM(Mg) |
≥9.8% |
9.85% |
| SULFUR (S) |
≥12.5% |
12.5% |
| WATER INSOLUBLE |
≤0.10% |
0.06% |
| Fe |
≤0.0015% |
<0.0015% |
| As |
≤0.0005% |
<0.0001% |
| HEAVY METAL (AS Pb) |
≤0.002% |
0.0002% |
| CHLORIDE |
≤0.0014% |
<0.0014% |
Application
Agriculture Printing and Dyeing Industry Paper-making Industry
Sewage Treatment Glass and Ceramic Industry Leather-making Industry
* Agriculture: Used as a magnesium and sulfur fertilizer to promote healthy crop growth.
* Animal Feed: Added to livestock feed to prevent magnesium deficiency.
* Personal Care: Included in bath salts to relieve muscle soreness and reduce inflammation.
* Food Industry: Used as a coagulant in tofu production and a brewing salt in beer.
* Chemical Industry: Serves as a drying agent and reagent in chemical synthesis.
* Environmental: Used for dust control and wastewater treatment.
Packaging & Shipping
Packaging
25kg bag 50kg bag 1000kg bag
Shipping
We mainly ship products by MSK, COSCO, MSC, MCC, CMA, OOCL, APL,HPL, ONE, WANHAI.
Certifications
Company Profile
Shandong Jiuchong Chemical Company Limited was founded in 2016, which is located in Weifang City, Shandong Province, China. We have 228 square meters of office space. Now Jiuchong chemical is a large modern international chemical enterprise with more than 28 series. Since our establishment, the company has gradually established and improved a sound supply chain system, quality monitoring system and service system, ensuring products quality and service.
At the same time, relying on our own geographical location and resource advantages, our company is committed to the optimization of a variety of chemical supply chain, including magnesium chloride, sodium metabisulfite, sodium bicarbonate, calcium chloride, magnesium sulfate, polyaluminium chloride, aluminium sulfate, industrial salt, soda ash etc.
Our products are sold well in 288 domestic cities and more than 36 foreign countries. Now the company has won the praise and trust of domestic and foreign customers. Based on stable quality and output, good team service and staff efforts, we will continue to develop domestic and foreign markets.
Jiuchong chemical takes "integrity, innovation and development" as the concept, puts integrity in the priority position in serving customers, and guarantees high quality products and satisfactory cooperation for customers experience. Your satisfaction is our driving force. Quality is the soul of enterprise and that is what we have always done. In the future, Shandong Jiuchong Chemical Company Limited hopes to build a brilliant tomorrow with you!
Customer Reviews
FAQ
Q1: Is this product safe to handle?
A: Yes, it is generally considered safe and non-toxic under normal handling conditions. However, we recommend wearing gloves and a mask to avoid prolonged skin or inhalation exposure, especially in large-scale use.
Q2: What is the shelf life of this product?
A: The shelf life is 2 years when stored in a cool, dry, and well-ventilated area. It should be kept away from moisture to prevent caking or decomposition.
Q3: What packaging options are available?
A: Standard packaging includes 25kg or 50kg plastic woven bags with inner liners. We also offer jumbo bags and customized bag marks according to your requirements.
Q4: Can you provide documents such as COA, MSDS, or TDS?
A: Absolutely. We can provide Certificate of Analysis (COA), Material Safety Data Sheet (MSDS), Technical Data Sheet (TDS), and other documents as needed for customs or technical review.
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